dma-mapping: move all DMA mapping code to kernel/dma

Currently the code is split over various files with dma- prefixes in the
lib/ and drives/base directories, and the number of files keeps growing.
Move them into a single directory to keep the code together and remove
the file name prefixes.  To match the irq infrastructure this directory
is placed under the kernel/ directory.

Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/Documentation/driver-api/infrastructure.rst b/Documentation/driver-api/infrastructure.rst
index bee1b9a1702f1cc6c89811aff6b8bdbc1eefb0b0..6172f3cc3d0b2109916cfccda2da1836065f8766 100644 (file)
--- a/Documentation/driver-api/infrastructure.rst
+++ b/Documentation/driver-api/infrastructure.rst
@@ -49,10 +49,10 @@ Device Drivers Base
 Device Drivers DMA Management
 -----------------------------
 
-.. kernel-doc:: drivers/base/dma-coherent.c
+.. kernel-doc:: kernel/dma/coherent.c
    :export:
 
-.. kernel-doc:: drivers/base/dma-mapping.c
+.. kernel-doc:: kernel/dma/mapping.c
    :export:
 
 Device drivers PnP support

diff --git a/MAINTAINERS b/MAINTAINERS
index c13b9fb3be0bb70a50cb9a88dfaa27b15f9c25dc..a6844a9e2f64034a3e86e4968239bacfd115f595 100644 (file)
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4359,12 +4359,7 @@ L:       iommu@lists.linux-foundation.org
 T:     git git://git.infradead.org/users/hch/dma-mapping.git
 W:     http://git.infradead.org/users/hch/dma-mapping.git
 S:     Supported
-F:     lib/dma-debug.c
-F:     lib/dma-direct.c
-F:     lib/dma-noncoherent.c
-F:     lib/dma-virt.c
-F:     drivers/base/dma-mapping.c
-F:     drivers/base/dma-coherent.c
+F:     kernel/dma/
 F:     include/asm-generic/dma-mapping.h
 F:     include/linux/dma-direct.h
 F:     include/linux/dma-mapping.h
@@ -13642,7 +13637,7 @@ M:      Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
 L:     iommu@lists.linux-foundation.org
 T:     git git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb.git
 S:     Supported
-F:     lib/swiotlb.c
+F:     kernel/dma/swiotlb.c
 F:     arch/*/kernel/pci-swiotlb.c
 F:     include/linux/swiotlb.h
 

diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index b074f242a43594fc3d3a383a9dce5d126e8f3a78..704f442958103545aa89ad0e986130aa6ebc5b06 100644 (file)
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -8,10 +8,7 @@ obj-y                  := component.o core.o bus.o dd.o syscore.o \
                           topology.o container.o property.o cacheinfo.o \
                           devcon.o
 obj-$(CONFIG_DEVTMPFS) += devtmpfs.o
-obj-$(CONFIG_DMA_CMA) += dma-contiguous.o
 obj-y                  += power/
-obj-$(CONFIG_HAS_DMA)  += dma-mapping.o
-obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += dma-coherent.o
 obj-$(CONFIG_ISA_BUS_API)      += isa.o
 obj-y                          += firmware_loader/
 obj-$(CONFIG_NUMA)     += node.o

diff --git a/include/linux/dma-contiguous.h b/include/linux/dma-contiguous.h
index b67bf6ac907d8f324494efaf1d441b0ee7955a13..3c5a4cb3eb953174c688c4b965ba09d87925fdb3 100644 (file)
--- a/include/linux/dma-contiguous.h
+++ b/include/linux/dma-contiguous.h
@@ -48,7 +48,7 @@
  *   CMA should not be used by the device drivers directly. It is
  *   only a helper framework for dma-mapping subsystem.
  *
- *   For more information, see kernel-docs in drivers/base/dma-contiguous.c
+ *   For more information, see kernel-docs in kernel/dma/contiguous.c
  */
 
 #ifdef __KERNEL__

diff --git a/init/Kconfig b/init/Kconfig
index 5a52f07259a2aab4ad5993801a6d15b5dfe5d4a3..fde3d09e8b27cef58d0c273c172bc6079f8b13e5 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1719,10 +1719,6 @@ source "arch/Kconfig"
 
 endmenu                # General setup
 
-config HAVE_GENERIC_DMA_COHERENT
-       bool
-       default n
-
 config RT_MUTEXES
        bool
 

diff --git a/kernel/Makefile b/kernel/Makefile
index d2001624fe7a31b788508e5da97924173bf2e33e..04bc07c2b42a9dfef399caea56a12b072f0ad028 100644 (file)
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -41,6 +41,7 @@ obj-y += printk/
 obj-y += irq/
 obj-y += rcu/
 obj-y += livepatch/
+obj-y += dma/
 
 obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
 obj-$(CONFIG_FREEZER) += freezer.o

diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
new file mode 100644 (file)
index 0000000..9bd5430
--- /dev/null
+++ b/kernel/dma/Kconfig
@@ -0,0 +1,50 @@
+
+config HAS_DMA
+       bool
+       depends on !NO_DMA
+       default y
+
+config NEED_SG_DMA_LENGTH
+       bool
+
+config NEED_DMA_MAP_STATE
+       bool
+
+config ARCH_DMA_ADDR_T_64BIT
+       def_bool 64BIT || PHYS_ADDR_T_64BIT
+
+config HAVE_GENERIC_DMA_COHERENT
+       bool
+
+config ARCH_HAS_SYNC_DMA_FOR_DEVICE
+       bool
+
+config ARCH_HAS_SYNC_DMA_FOR_CPU
+       bool
+       select NEED_DMA_MAP_STATE
+
+config DMA_DIRECT_OPS
+       bool
+       depends on HAS_DMA
+
+config DMA_NONCOHERENT_OPS
+       bool
+       depends on HAS_DMA
+       select DMA_DIRECT_OPS
+
+config DMA_NONCOHERENT_MMAP
+       bool
+       depends on DMA_NONCOHERENT_OPS
+
+config DMA_NONCOHERENT_CACHE_SYNC
+       bool
+       depends on DMA_NONCOHERENT_OPS
+
+config DMA_VIRT_OPS
+       bool
+       depends on HAS_DMA
+
+config SWIOTLB
+       bool
+       select DMA_DIRECT_OPS
+       select NEED_DMA_MAP_STATE

diff --git a/kernel/dma/Makefile b/kernel/dma/Makefile
new file mode 100644 (file)
index 0000000..6de44e4
--- /dev/null
+++ b/kernel/dma/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_HAS_DMA)                  += mapping.o
+obj-$(CONFIG_DMA_CMA)                  += contiguous.o
+obj-$(CONFIG_HAVE_GENERIC_DMA_COHERENT) += coherent.o
+obj-$(CONFIG_DMA_DIRECT_OPS)           += direct.o
+obj-$(CONFIG_DMA_NONCOHERENT_OPS)      += noncoherent.o
+obj-$(CONFIG_DMA_VIRT_OPS)             += virt.o
+obj-$(CONFIG_DMA_API_DEBUG)            += debug.o
+obj-$(CONFIG_SWIOTLB)                  += swiotlb.o
+

diff --git a/drivers/base/dma-coherent.c b/kernel/dma/coherent.c
similarity index 100%
rename from drivers/base/dma-coherent.c
rename to kernel/dma/coherent.c

diff --git a/drivers/base/dma-contiguous.c b/kernel/dma/contiguous.c
similarity index 100%
rename from drivers/base/dma-contiguous.c
rename to kernel/dma/contiguous.c

diff --git a/lib/dma-debug.c b/kernel/dma/debug.c
similarity index 100%
rename from lib/dma-debug.c
rename to kernel/dma/debug.c

diff --git a/lib/dma-direct.c b/kernel/dma/direct.c
similarity index 100%
rename from lib/dma-direct.c
rename to kernel/dma/direct.c

diff --git a/drivers/base/dma-mapping.c b/kernel/dma/mapping.c
similarity index 99%
rename from drivers/base/dma-mapping.c
rename to kernel/dma/mapping.c
index f831a582209c63b7412a6a4276ed7f1205371610..d2a92ddaac4d14c8683433856672fddbace7a4c9 100644 (file)
--- a/drivers/base/dma-mapping.c
+++ b/kernel/dma/mapping.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * drivers/base/dma-mapping.c - arch-independent dma-mapping routines
+ * arch-independent dma-mapping routines
  *
  * Copyright (c) 2006  SUSE Linux Products GmbH
  * Copyright (c) 2006  Tejun Heo <teheo@suse.de>

diff --git a/lib/dma-noncoherent.c b/kernel/dma/noncoherent.c
similarity index 100%
rename from lib/dma-noncoherent.c
rename to kernel/dma/noncoherent.c

diff --git a/lib/swiotlb.c b/kernel/dma/swiotlb.c
similarity index 100%
rename from lib/swiotlb.c
rename to kernel/dma/swiotlb.c

diff --git a/lib/dma-virt.c b/kernel/dma/virt.c
similarity index 98%
rename from lib/dma-virt.c
rename to kernel/dma/virt.c
index 8e61a02ef9ca06cb2aabfaef7484a44f31610ef1..631ddec4b60a8b94576b1c3a36db71a818bff5d8 100644 (file)
--- a/lib/dma-virt.c
+++ b/kernel/dma/virt.c
@@ -1,7 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- *     lib/dma-virt.c
- *
  * DMA operations that map to virtual addresses without flushing memory.
  */
 #include <linux/export.h>

diff --git a/lib/Kconfig b/lib/Kconfig
index 809fdd155739b48470b1c32dc5447b32b86e10dc..803fcbced7293297ea52f2a91ddc9c91d8a99eda 100644 (file)
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -420,60 +420,15 @@ config HAS_IOPORT_MAP
        depends on HAS_IOMEM && !NO_IOPORT_MAP
        default y
 
-config HAS_DMA
-       bool
-       depends on !NO_DMA
-       default y
+source "kernel/dma/Kconfig"
 
 config SGL_ALLOC
        bool
        default n
 
-config NEED_SG_DMA_LENGTH
-       bool
-
-config NEED_DMA_MAP_STATE
-       bool
-
-config ARCH_DMA_ADDR_T_64BIT
-       def_bool 64BIT || PHYS_ADDR_T_64BIT
-
 config IOMMU_HELPER
        bool
 
-config ARCH_HAS_SYNC_DMA_FOR_DEVICE
-       bool
-
-config ARCH_HAS_SYNC_DMA_FOR_CPU
-       bool
-       select NEED_DMA_MAP_STATE
-
-config DMA_DIRECT_OPS
-       bool
-       depends on HAS_DMA
-
-config DMA_NONCOHERENT_OPS
-       bool
-       depends on HAS_DMA
-       select DMA_DIRECT_OPS
-
-config DMA_NONCOHERENT_MMAP
-       bool
-       depends on DMA_NONCOHERENT_OPS
-
-config DMA_NONCOHERENT_CACHE_SYNC
-       bool
-       depends on DMA_NONCOHERENT_OPS
-
-config DMA_VIRT_OPS
-       bool
-       depends on HAS_DMA
-
-config SWIOTLB
-       bool
-       select DMA_DIRECT_OPS
-       select NEED_DMA_MAP_STATE
-
 config CHECK_SIGNATURE
        bool
 

diff --git a/lib/Makefile b/lib/Makefile
index 5e0e160c92425fc25672843f7556dca9c9586729..8153fdab287f5250496504c1d24c34d78b82fc4f 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -29,9 +29,6 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
 lib-$(CONFIG_PRINTK) += dump_stack.o
 lib-$(CONFIG_MMU) += ioremap.o
 lib-$(CONFIG_SMP) += cpumask.o
-obj-$(CONFIG_DMA_DIRECT_OPS) += dma-direct.o
-obj-$(CONFIG_DMA_NONCOHERENT_OPS) += dma-noncoherent.o
-obj-$(CONFIG_DMA_VIRT_OPS) += dma-virt.o
 
 lib-y  += kobject.o klist.o
 obj-y  += lockref.o
@@ -148,7 +145,6 @@ obj-$(CONFIG_SMP) += percpu_counter.o
 obj-$(CONFIG_AUDIT_GENERIC) += audit.o
 obj-$(CONFIG_AUDIT_COMPAT_GENERIC) += compat_audit.o
 
-obj-$(CONFIG_SWIOTLB) += swiotlb.o
 obj-$(CONFIG_IOMMU_HELPER) += iommu-helper.o
 obj-$(CONFIG_FAULT_INJECTION) += fault-inject.o
 obj-$(CONFIG_NOTIFIER_ERROR_INJECTION) += notifier-error-inject.o
@@ -169,8 +165,6 @@ obj-$(CONFIG_NLATTR) += nlattr.o
 
 obj-$(CONFIG_LRU_CACHE) += lru_cache.o
 
-obj-$(CONFIG_DMA_API_DEBUG) += dma-debug.o
-
 obj-$(CONFIG_GENERIC_CSUM) += checksum.o
 
 obj-$(CONFIG_GENERIC_ATOMIC64) += atomic64.o